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Để lát hết một cái sân người ta phải dùng 300 viên gạch buổi sáng lát được 2/5 sân buổi chiều lát được 1/3 sân hỏi mỗi buổi người ta lát được bao nhiêu viên gạch

mn giải giúp e vs ạ toán 11 nha Tính tổng các nghiệm thuộc [0;2 π] thỏa mãn phương trình : ( sin x/2 + cos x/2 ) ² + √3cosx=3

Câu 2 (3 điểm): Làm thế nào để biết trong Cao có lẫn Mg0? Câu 3 (4 điểm): Cho 3, 2 gam Cuo tác dụng vừa đủ với dung dịch H2SO4 4,9%. Tính nồng độ % của dung dịch CuSO4 (Cu = 64, H = 1, S = 32,0 = 16).

bài 1 tính tổng dãy số cách đều sau a) D = 1+2+3+.....+47+48+49 b) E = 5 + 10 + 15 + ..... + 185 + 190 + 195

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Mình sẽ vote 5 sao giúp mình với ạ

Ex1: Hãy chuyển các câu sau sang dạng câu diễn đạt "Wish". 1. I can't go home on time to have dinner with my family. 2. I don't have spare time to read the rest of the book. 3. He can't swim. 4. You always write carelessly. 5. The teacher won't explain the lesson to you again tomorrow. 6. We can't buy this house because of its high price. 7. I'm sorry. I won't be there at 8:00 A.M. 8. They won't offer to help me paint the wall. 9. It is very cold. According to radio, it won't be warmer tomorrow. 10. She doesn't pay attention to what I am saying. 11. I think it won't be bright tomorrow. 12. She can't travel by air. 13. He won't give you a chance to work at the company. 14. We can't write to him because we don't have any time. 15. They can't be here tomorrow morning. Mọi người giúp mình với ạ

Vẽ sabo Chibi ( k mạng ,kèm theo chữ kí trong hình.Hết)

41. If you…………Tom, tell him I have a message for him. a. will meet b. would meet c. meet d. met 42. If you …………too hot during the night, turn down the central heating. a. will feel b. felt c. feel d. feels. 43. If you …………with your dictionary, I’d like to borrow it. a. finish b. finished c. will finish d. are finishing. 44. If I lived nearer the centre, I …………always late. a. wouldn’t be b. can be c. won’t be d. will be. 45. What would Lan do if she …………..the Miss world. a. would be b. were c. will be d. is. 46. If I ………….her, I would have said “hello” a. has seen b. have seen c. saw d. had seen. 47. If she had read the passage more slowly, the candidate……………………. a. understood. B. would have understood c. will understood d. would understand. 48. If it……………, they will not go out. a. rains b. rained c. rain d. raining. 49. Jame will not complete the work if she is …………..rarely enough. a. tell b. telling c. tells d. told. 50. Betty will not go to the party unless John ……………….too. a. go b. went c. going d. goes 51. Ms. An does not want to go on the trip if nobody…………..with her. a. go b. goes c. went d. going. 52. If you ………….to go shopping, please go with your aunt this weekend. a. wants b. want c. wanting d. wanted. 53. Mr. Smith has to work on weekends if his manager………….him to. a. tell b. telling c. told d. tells. 54. Unless they ……………her to work hard, she would not. a. encourage b. encourage c. encourages d. encouraging. 55. If I ……….a king, I would give money to the poor. a. is b. are c. am d. were. 56. If we had left this country, we would have………….to Australia. a. emigrated b. emigrates c. emigrate d. emigrating. 57. If I had to the party last night, I …………her. a. will have met. b. would meet c. would have met d. will meet. 58. Unless the pupils pay attention, the teacher …………….be angry. a. would b. may c. will d. might. 59. Please do not go out if it………………. a. rain b. rains c. rained d. raining. 60. If you ……………me with this exercise, I will do the same for you one day. a. helped b. would help c. help d. will help. 61. If you listen to music, you can’t ……………your study. a. concentrate on b. interested in c. care about d. read about. 62. ……………you study harder, you won’t pass the final exam. a. unless b. if c. if not d. without.